if you're not careful. >> reporter: the devastation from superstorm sandy is a fresh memory, and so is the blizzard two years ago that dumped 20 inches here. the streets took days to clear, hindering emergency vehicles and city buses. >> we're just basically stuck on this block, you know? >> reporter: g.p.s. tracking devices on garbage trucks will allow new yorkers to punch their addresss into a web page and track when their block will be plowed. 6,100 sanitation workers are now mobilized. 400 more than two years ago. union president harry nespoli said they just started to catch their breath after sandy. >> i wouldn't say they're tired. they feel it, they extended themselves for sandy 12 hour shifts for 60 days. >> reporter: and here we go again. >> yes, and that's why they call new york's sanitation men new york's strongest. >> reporter: new york city has roughly 6,300 miles of road. that's enough to drive from here to los angeles and back. scott, the city has 250,000 tons of salt available to help keep all that roadway clear. >> pelley: jim, thank you, superstorm sandy also knocked d